817661114874 has 24 divisors (see below), whose sum is σ = 1771793543520. Its totient is φ = 272523787848.

The previous prime is 817661114867. The next prime is 817661114909. The reversal of 817661114874 is 478411166718.

817661114874 is a `hidden beast` number, since 8 + 1 + 7 + 6 + 611 + 14 + 8 + 7 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 817661114874.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2324244 + ... + 2652815.

It is an arithmetic number, because the mean of its divisors is an integer number (73824730980).

Almost surely, 2^817661114874 is an apocalyptic number.

817661114874 is an abundant number, since it is smaller than the sum of its proper divisors (954132428646).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

817661114874 is a wasteful number, since it uses less digits than its factorization.

817661114874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4986194 (or 4986191 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 54.

The spelling of 817661114874 in words is "eight hundred seventeen billion, six hundred sixty-one million, one hundred fourteen thousand, eight hundred seventy-four".